1. Department of Ophthalmology, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
2. Department of BioMedical Research, University of Bern, 3008 Bern, Switzerland
3. Graduate School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland
4. Department of Oncology, Microbiology and Immunology, University of Fribourg, 1700 Fribourg, Switzerland